Technical question on "mild cam"

I recently bought a '75 Dart Sport with a 360. The guy I bought it from said it "has a mild cam", but he didn't have specifics because the guy HE bought it from didn't say. The engine runs great, currently, but I intend to tear it down when I strip the body down for paint. Now, the question:

How can I tell what cam it is, so I can get proper specs on valve adjustment? I'm new to non-stick internals.

I thought about just measuring the valve lash as it sits, just to get a ball park. Either that, or sink the money into a new cam, lifters, rods, er cetera, but I really don't want to spend that much if I can help it.

Thanks!